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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1294914Generated: October 31, 2026

Hydrazine hydrate (1:1) → 7-chloro-3-(2,4-dimethoxyphenyl)-1H-indazole

https://huagongshe.com/reaction/1294914

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrazine hydrate (1:1)HCID 24654—
Reactant(3-Chloro-2-fluorophenyl)(2,4-dimethoxyphenyl)methanoneHCID 64713965—
Catalyst4-(Dimethylamino)pyridineHCID 14284—
Product7-chloro-3-(2,4-dimethoxyphenyl)-1H-indazoleHCID 17848914152.2%

Reaction Steps

Prepared according to Method D Step A from (2,4-dimethoxyphenyl)[2-fluoro-3-chlorophenyl]methanone (1.20 g, 4.1 mmol), hydrazine hydrate (1.61 mL, 51.7 mmol) and DMAP (0.632 g, 5.17 mmol) to give the product (0.618 g) as a yellow solid.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07241791B2
Source datasetuspto-grants-2007_07
ORD IDord-93f20c06e93d4b33990df43b3e1e2104
Source noteuspto-grants-2007_07